99: Gretzky: His Game, His Story

99: Gretzky: His Game, His Story

Matematika Sekolah Menengah Pertama pola bilangan 20,15,10,5 plis jawab ug benar

pola bilangan 20,15,10,5 plis jawab ug benar

Pola Barisan 20, 15, 10, 5, ....

Suku Pertama (a) = U1 = 20

Beda (b) = U2 - U1 = 15 - 20 = (-5)

Rumus Suku Ke-n Adalah

Un = a + (n - 1)•b

Un = 20 + (n - 1)•(-5)

Un = 20 + (-5n) + 5

Un = 20 + 5 - 5n

Un = 25 - 5n

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